uptime.cpp

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/***************************************************************************
 *   Copyright (C) 2003 by Hans Karlsson                                   *
 *   karlsson.h@home.se                                                      *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 ***************************************************************************/

#include "uptime.h"

#include <QFile>
#include <QTextStream>

#if defined __FreeBSD__
#include <sys/time.h>
#include <sys/sysctl.h>
#endif

#if defined(Q_OS_NETBSD)
#include <sys/param.h>
#include <sys/time.h>
#include <sys/sysctl.h>
#endif

UptimeSensor::UptimeSensor(int interval) : Sensor(interval)
{}
UptimeSensor::~UptimeSensor()
{}

void UptimeSensor::update()
{
#if defined __FreeBSD__ || defined(Q_OS_NETBSD)
    struct timeval  boottime;
    time_t          now;            /* the current time of day */

    double avenrun[3];
    time_t uptime;
    int days, hours, i, mins, secs;
    int mib[2];
    size_t size;
    char buf[256];

    /*
     * Get time of day.
     */
    (void)time(&now);

    /*
     * Determine how long system has been up.
     * (Found by looking getting "boottime" from the kernel)
     */
    mib[0] = CTL_KERN;
    mib[1] = KERN_BOOTTIME;
    size = sizeof(boottime);
    if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
            boottime.tv_sec != 0) {
        uptime = now - boottime.tv_sec;
        if (uptime > 60)
            uptime += 30;
        days = uptime / 86400;
        uptime %= 86400;
        hours = uptime / 3600;
        uptime %= 3600;
        mins = uptime / 60;
        secs = uptime % 60;
    }
#else
    QFile file("/proc/uptime");
    QString line;
    if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
        // file opened successfully
        QTextStream t(&file);          // use a text stream
        line = t.readLine();         // line of text excluding '\n'
        file.close();

        QRegExp rx("^\\d+");
        rx.indexIn(line);
        int uptime = rx.cap(0).toInt();
        int days = uptime / 86400;
        uptime -= days * 86400;
        int hours = uptime  / 3600;
        uptime -= hours * 3600;
        int mins = uptime / 60;
        uptime -= mins * 60;
        int secs = uptime;
#endif

    QString format;
    SensorParams *sp;
    Meter *meter;
    QObject *obj;

    foreach(obj, *objList) {
        sp = (SensorParams*)(obj);
        meter = sp->getMeter();
        format = sp->getParam("FORMAT");

        if (format.length() == 0) {
            format = "%dd %h:%M";
        }
        format.replace(QRegExp("%d"), QString::number(days));
        format.replace(QRegExp("%H"), QString::number(hours).rightJustified(2, '0'));
        format.replace(QRegExp("%M"), QString::number(mins).rightJustified(2, '0'));
        format.replace(QRegExp("%S"), QString::number(secs).rightJustified(2, '0'));
        format.replace(QRegExp("%h"), QString::number(hours));
        format.replace(QRegExp("%m"), QString::number(mins));
        format.replace(QRegExp("%s"), QString::number(secs));

        meter->setValue(format);
    }

#if !defined __FreeBSD__ && !defined(Q_OS_NETBSD)
}
#endif
}